51LA Exp5 F10 - EXPERIMENT#5 Using Extraction to Separate a...

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EXPERIMENT #5 Using Extraction to Separate a Mixture Tuesday, October 26 Monday, November 1, 2010 Techniques: Extraction (acid-base), Recrystallization, Melting Point, TLC In this experiment, we will use an acid-base variation of the extraction technique to separate a mixture of an acidic and a neutral organic compound. We will then purify the separated compounds by recrystallization and identify the compounds by TLC and melting point. (Note: this experiment is written as a two-week project in your textbook, but we will do it in one lab period. You need to be prepared! Write your procedures carefully!) Reading Assignment for Experiment #5: Read Project 2: Using Extraction to Separate a Mixture in the Modern Projects text (pgs 243-246) Review Techniques 11 and 12, especially 11.3, 11.4, and 11.6. (Technique 8, especially 8.2-8.4 & 8.7 in 2 nd Ed.) Review Acid/Base Reactions in Chapter 2 of your 51A Textbook Pre-Lab Questions 1) How much drying agent should be used to dry 5mL of an organic solvent? To dry 40mL of an organic solvent?
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